@inproceedings{CAiSE-2004-MalinowskiZ,
	author        = "Elzbieta Malinowski and Esteban Zimányi",
	booktitle     = "{Proceedings of the 16th International Conference on Advanced Information Systems Engineering}",
	doi           = "10.1007/978-3-540-25975-6_34",
	isbn          = "3-540-22151-4",
	pages         = "477--491",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{OLAP Hierarchies: A Conceptual Perspective}",
	volume        = 3084,
	year          = 2004,
}